package org.example.big_event.controller;

import ch.qos.logback.core.util.StringUtil;
import jakarta.validation.constraints.Pattern;
import org.example.big_event.pojo.Result;
import org.example.big_event.pojo.User;
import org.example.big_event.service.UserService;
import org.example.big_event.utils.JwtUtil;
import org.example.big_event.utils.Md5Util;
import org.example.big_event.utils.ThreadLocalUtil;
import org.hibernate.validator.constraints.URL;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.util.StringUtils;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.*;

import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

@RestController
@RequestMapping("/user")
@Validated
public class UserController {

    @Autowired
    private UserService userService;
    @Autowired
    private StringRedisTemplate stringRedisTemplate;
    //注册
    @PostMapping("/register")
    public Result register (@Pattern(regexp = "^\\S{5,16}$") String username, @Pattern(regexp = "^\\S{5,16}$")String password){
        //查询用户
        User user = userService.findByUsername(username);
        if (user==null){
            //没有占用
            //执行注册
            userService.register(username,password);
            return Result.success();
        }
        else {
            //被占用
            //返回提示信息
            return Result.error("用户名已被注册");
        }
    }
//    登录
    @PostMapping("/login")
    public Result<String> login (@Pattern(regexp ="^\\S{5,16}$")String username, @Pattern(regexp ="^\\S{5,16}$")String password){
        //根据用户名查询用户
        User loginUser = userService.findByUsername(username);
        //判断用户是否存在
        if (loginUser==null){
            return Result.error("用户名为空");
        }
//        判断密码是否正确，loginUser对象中的password是密文
        if(Md5Util.getMD5String(password).equals(loginUser.getPassword())){
            //登录成功
            Map<String,Object> claims = new HashMap<>();
            claims.put("id",loginUser.getId());
            claims.put("username",loginUser.getUsername());
            String token = JwtUtil.genToken(claims);
            //把token存入到redis中
            ValueOperations<String, String> operations = stringRedisTemplate.opsForValue();
            operations.set(token,token,1, TimeUnit.HOURS);
            return Result.success(token);
        }
        return Result.error("密码错误");
    }
   //拦截器
    @GetMapping("/userInfo")
    public Result<User> userInfo (/*@RequestHeader(name = "Authorization") String token*/){
//       根据用户名查询用户
      /*  Map<String, Object> map = JwtUtil.parseToken(token);
        String username = (String)map.get("username");*/
        Map<String,Object> map = ThreadLocalUtil.get();
        String username = (String) map.get("username");
        User user = userService.findByUsername(username);
        return Result.success(user);
    }
    //更新用户基本信息
    @PutMapping("/update")
    public Result update(@RequestBody @Validated User user){
        userService.update(user);
        return Result.success();
    }
    //更新用户头像
    @PatchMapping("/updateAvatar")
    public Result updateAvatar(@RequestParam @URL String avatarUrl){
        userService.updateAvatar(avatarUrl);
        return Result.success();
    }
    //更新密码
    @PatchMapping("/updatePwd")
    public Result updatePwd(@RequestBody Map<String,String> params,@RequestHeader("Authorization") String token){
    //1.校验参数
        String oldPwd = params.get("old_pwd");
        String newPwd = params.get("new_pwd");
        String rePwd = params.get("re_pwd");
        if (!StringUtils.hasLength(oldPwd)||!StringUtils.hasLength(newPwd)||!StringUtils.hasLength(rePwd)){
            return Result.error("缺少必填的参数");
        }
        //原密码是否正确
        //调用userService根据用户名获取原密码，与加密的old_Pwd对比
        Map<String,Object> map = ThreadLocalUtil.get();
        String username = (String) map.get("username");
        User loginUser = userService.findByUsername(username);
        if(!loginUser.getPassword().equals(Md5Util.getMD5String(oldPwd))){
            return Result.error("原密码不正确");
        }
        //newPwd和rePwd是否一致
        if (!newPwd.equals(rePwd)){
            return Result.error("两次输入的密码不一致");
        }
    //2.调用Service层完成密码更新
        userService.updatePwd(newPwd);
        ValueOperations<String, String> operations = stringRedisTemplate.opsForValue();
        operations.getOperations().delete(token);
        return Result.success();
    }
}
